There are two important factors to the under surface or base of Artificial Grass.Firstly, the under base must be able to support the intended traffic of the area. Secondly the under base must supply sufficient drainage for the artificial thurf.The type of base works required will vary according to which productis used and what it is used for. The required base-works can vary fromjust compacted soil with sufficient drainage to full g5 sub-base withcement or asphalt bases. Please see the DIY instructions for a basicbase design.